Focus on Cellulose ethers

E hia te momo momo whakamatotoru o te peita?

Ko te Thickener he momo motuhake o te taapiri rheological, ko tana mahi matua ko te whakanui ake i te kirikiri o te wai peita, te whakapai ake i te mahi rokiroki, te mahi hanga me te paanga kiriata peita o te peita.

Ko te mahi a nga kaitao i roto i nga paninga

mātotoru

Anti-settling

parewai

Anti-sagging

Anti whakaheke

Whakapai ake i te kaha marara

Whakapai ake i nga mahi hanga

Whakanuia te matotoru kiriata peita

Whakapai ake i te paanga o te mata

Ko nga ahuatanga o nga momo momo momo matotoru

1. Whakakao parakore

Ko te mea tino whakamahia ko te bentonite pararopi, ko te montmorillonite te waahanga matua. Ko tana hanganga motuhake ka taea te whakakii i te paninga ki te pseudoplasticity kaha, te thixotropy, te pumau o te aukati me te whakahinuhinu. Ko te maataapono o te whakamaroketanga ko te paura ka mimiti i te wai, ka pupuhi ki te whakapakeke i te wahanga wai, na reira he pupuri wai.

Ko nga ngoikoretanga ko: he ngoikore te rere me te whakataurite i nga mahi, ehara i te ngawari ki te marara me te taapiri.

2. Cellulose ether

Ko te mea tino whakamahiahydroxyethyl cellulose(HEC), he nui te kaha o te matotoru, te pai o te whakatārewatanga, te whakamararatanga me te pupuri wai, te nuinga mo te whakapakeke i te wahanga wai.

Ko nga ngoikoretanga ko: te pa ki te aukati wai o te paninga, te iti o te mahi anti-maaka, me te ngoikore o te mahi whakataurite.

3. Kiriaku

Ko te tikanga ka wehewehea nga kaitao kiriaku ki nga momo e rua: ko te kiriaku alkali-swellable thickeners (ASE) me te hononga alkali-swellable thickeners (HASE).

Ko te maataapono whakapakeke o te waikawa kiriaku alkali-swellable thickener (ASE) ko te wehe i te carboxylate ina whakatika te pH ki te kawakore, kia totoro te mekameka ngota mai i te helical ki te rakau na roto i te repulsion electrostatic i waenga i nga katote carboxylate. , te whakapai ake i te Ko te viscosity o te wahanga wai. Ko tenei momo kaitao he nui te kaha o te matotoru, te pseudoplasticity kaha me te whakatārewatanga pai.

Ko te kaitakawaenga-a-te-a-te-a-waa-a-iwi (HASE) he whakauru i nga roopu hydrophobic i runga i te kaupapa o nga kaitao-a-waa-a-waa (ASE). Waihoki, ka whakatikahia te pH ki te kawakore, ko te whakaheke hiko i waenga i nga katote carboxylate e hanga ana Ko te mekameka ngota ka toro atu i te ahua helical ki te ahua o te rakau, e whakanui ana i te viscosity o te wahanga wai; a ka taea e nga roopu hydrophobic i whakauruhia ki te mekameka matua te hono ki nga matūriki taherapa hei whakanui ake i te pokey o te wahanga whakaehunga.

Ko nga ngoikoretanga ko: he tairongo ki te pH, he iti te rere me te whakataurite o te kiriata peita, he ngawari ki te matotoru i muri mai.

4. Polyurethane

Ko te polyurethane associative thickener (HEUR) he hydrophobically modified polyurethane polyurethane polymer wai-wairewa, no te katote-kore-a-honohono thickener. E toru nga wahanga: te turanga hydrophobic, te mekameka hydrophilic me te turanga polyurethane. Ka whakawhānuihia te turanga polyurethane i roto i te wairewa peita, a ka pumau te mekameka hydrophilic i roto i te waahanga wai. Ka hono te turanga hydrophobic ki nga hanganga hydrophobic penei i te matūriki taherapa, surfactants, me te poaka. , hanga i te hanganga whatunga ahu toru, kia rite ki te whakatutuki i te kaupapa o te matotoru.

Kei te tohuhia e te matotoru o te wahanga whakaehunga, te rere pai me te mahi whakataurite, te pai o te matotoru me te pai ake o te rokiroki pokey, kaore he rohe pH; a he painga kitea i roto i te aukati wai, te kanapa, te marama, me era atu.

Ko nga ngoikoretanga ko: i roto i te punaha me te iti o te punaha pokey, kaore i te pai te paanga anti-settling i runga i te paura, a ka ngawari te paanga o te whakamaarama e nga dispersants me nga whakarewa.


Wā tuku: Tihema-12-2022
WhatsApp Chat Online!